I've had an EMG; never had a NCS, though. The EMG, honestly, made me feel a bit like a cat in a skinner box. It was uncomfortable, perhaps a tad painful, but not that bad overall. Deep down, I really just felt like a cat in a skinner box--meow. Hated the test, but once it was done, it was done. Not a huge deal.
Best of luck,
Current dx: Rheumatoid Arthritis
Suspected dx: UCTD/Early Lupus
Current Meds: Enbrel, Plaquenil, Aciphex, Ultracet, Zyrtec, Allavert-D, Zantac, Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan